The Chemical Composition of an Extrasolar Minor Planet
arXiv:0708.0198 · doi:10.1086/522223
Abstract
We report the relative abundances of 17 elements in the atmosphere of the white dwarf star GD 362, material that, very probably, was contained previously in a large asteroid or asteroids with composition similar to the Earth/Moon system. The asteroid may have once been part of a larger parent body not unlike one of the terrestrial planets of our solar system.
ApJ, in press